<pre class="shiki github-dark shaku"><code>/** * @param {any[]} arr1 * @param {any[]} arr2 * @returns {any[]} */function getIntersection(arr1, arr2) { // const set1=new Set(arr1) // const set2=new Set(arr2) // const result = set1.intersection(set2) // return [...result] const set2 = new Set(arr2) const result = new Set() for(const item of arr1){ if(set2.has(item)){ result.add(item) } } return [...result]}</code></pre>

0(1) solution with not supported intersection

Given two arrays, find the intersection(items occur in both arrays) 1. arrays are not sorted, and might have duplicates. 2. you can modify the arrays …